Certified Rhythm Analysis Technician (CRAT) Practice Exam

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What is the best interpretation of the rhythm described as regular with an early beat?

PAC

The best interpretation of the rhythm described as regular with an early beat is PAC, which stands for Premature Atrial Contraction. In a PAC, the heart rhythm is generally regular; however, there is an earlier-than-normal contraction of the atria, resulting in a sensation of an early heartbeat. This occurs due to an ectopic focus in the atrium that fires before the next scheduled beat.

The regularity of the overall rhythm, combined with the early occurrence of a beat, aligns with the characteristics of PAC. The other terms refer to different types of rhythms: PAV (Premature Atrial Ventricular), which is not a standard terminology but may cause confusion, PJC (Premature Junctional Contraction), which involves junctional beats rather than atrial, and PVC (Premature Ventricular Contraction), which is characterized by a premature ventricular beat, thus making them not applicable in this context.

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PAV

PJC

PVC

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